Perry, do you prefer Rockwool to Owens Corning 703? I need to put up some absorption on the wall behind my listening position. Behind the speakers (dipole panels and the OB/Dipole Subs) on the opposite wall I'll be using diffusion.

Perry, do you prefer Rockwool to Owens Corning 703? I need to put up some absorption on the wall behind my listening position. Behind the speakers (dipole panels and the OB/Dipole Subs) on the opposite wall I'll be using diffusion.

Cant say, I've never used Owens Corning 703 for audio.I've used a lot of different types of insulation for work, the semi rigid Owenscould get pricey if you need a lot.A bag of Roxul Safe n' Sound goes a long way.

I can tell you that if you are using panels, leave them away from thewall. Mine are 4" thick and stand out from the wall about 3".

Amazing how much bass these H-frames put out. Just in awe. First track from Neil Young's Le Noise has some serious power. They are speakers made for rock for sure. Need bass traps though, definitely need some bass absorption bad.

Amazing how much bass these H-frames put out. Just in awe. First track from Neil Young's Le Noise has some serious power. They are speakers made for rock for sure. Need bass traps though, definitely need some bass absorption bad.

Well part of the reason for me is that my preamp at the time didn't have an extra output, so I had to use a splitter. Then the impedence of the sub amp is added to the main amp. I think my preamp didn't like that. It's much, much better using speaker level. And it's easier to get the sub blended with the main driver this way.

Ah that makes sense. I fortunately do not need to use a split on my main amp as it has a separate line level out that is tied to the volume control. And is passes through the same tube preamp stage of the amp, which is giving the plate amps the same sonic signature as the mains (also a good thing). I haven't done any measurements yet, but they seem pretty to integrate.

I did get a pair of the fMod line level passive HP filters, but I don't see any way to make those work with my amp without a splitter. It would be nice to free the amp from having to reproduce those low frequencies, but I don't know what trade off is better (run the tube amp full range and use the line outs to the plate amps, giving the plate amps the same tube sig. as the mains) vs. getting the extra power out of the tube amp. I'll play around with it.